Type of printer (3-3)
'type of printer' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for inkjet that I've seen before include "Type of electronic printing" , "Kind of printer" , "and 20 Across: Type of computer accessory" , "Type of office printer" , "Printer powered by a liquid engine" .)
'type of printer' is the definition.
This is all the clue.